Blower attachment for sewing-machines



(No Model.)

J. P. ELLIOTT. BLOWER ATTACHMENT FOR SEWING MACHINES No. 423,916. Patented Mar. 25, 1890.

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N. PETERS. PMlo-Umognpber. wmmmn. B4 c throat-plate D, said delivery end of said pipe 'terial a which is connected at one end or side UNITED STATES PATENT OFFICE.

J OI IN F. ELLIOTT, OF CINCINNATI, OHIO, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY OF NEW JERSEY.

BLOWER ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 423,916, dated March 25, 1890.

Application filed October 16, 1889.

To all whom it may concern:

Be it known that 1, JOHN F. ELLIOTT, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful improvements in Blower Attachments for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object to provide a device for making a current of air to blow the lint and dirt out and away from the feed, and from the shuttle-race and shuttle or revolving hook, of a sewing-machine, and thereby avoid the trouble resulting from the clogging of these parts by the lint and dirt which works through the feed and needle openings of the throat-plate. My blower is preferably intermittent in its action, so that the blast will not occur at the moments of the formation of the loops of needle-thread to interfere with the proper action of the needle and shuttle, or hook or looper.

In the drawings, Figure l is a bottom view of a Singer sewing-machine with my invention applied thereto, the shuttle-race and shuttle-driver being removed. Fig. 2 is a detail view to show the relation of the delivery end of the blast-pipe to the throat-plate, and Figs. 3 and t are detail views of the blower.

A denotes the oscillating shuttle-driving shaft of a Singer sewing-machine, and B is the blowercasing surrounding said shaft. The casing is provided with a proper opening or openings for the admission of air, and extending from the delivery portion of said casing to the throat-plate is the blast-pipe C, the delivery end of which is adjacent to the being of a form, as shown, to direct the air against said plate and to the needle and feed openings.

Within the blowercasing B is a fan or wing 19, attached to the shaft A and made preferably in the form of a valve, which will close when moving in one direction, but will open on the return movement. This is offected in the present instance by making the wing b in the form of a frame and attaching thereto a thin piece of leather or other ma- Serial No. 327,187. (No model.)

to said frame, leaving its other end or side free, said material (it thus forming a swinging door. Thus at the forward movement of the I fan or wing the door a will lie against the frame of the said fan or wing, but on the return movement it will swing out from said frame, as denoted in Fig. 3, and thus permit the air to pass, so that there will not be an inward suction to the blast-pipe. This provides for an intermittent action of the blast, and the parts will be so arranged and timed that the blast will be suspended at the moments when the needle is throwing out loops to be engaged by the shuttle or hook, and thus the proper formation of the loops will not be interfered with.

I do not wish to be understood as limiting myself to all of the details herein shown, as the form of the blower may be varied without departing from the spirit of my invention.

I am aware that sewing-machines having trimming attachments have heretofore been provided with air-forcing devices for blowing away the trimmings, but in all such devices the blast-pipes terminated above the throatplates, so that instead of preventing dirt and lint from working down through the needle and feed openings into the shuttle-races they had a tendency to force dirt and lint downward, so that in these instances the shuttle races were more liable to become clogged than with machines having no blower attachments. In my invention the delivery end of the blastpipe is beneath the throat-plate adjacent to the needle and feed openings, so that the currents of air pass upward through said openings and effectually prevent dirt and lint from working downward.

I claim Y 1. A sewing machine provided with a blower attachment having a blast-pipe eX- tending to and opening beneath the under side of the throatplate with its delivery end adjacent to the feed and needle openings thereof, whereby currents of air will be caused to ascend through the said openings and thereby prevent lint and dirt from passing downward through the same to clog the shuttle-race.

2. In a sewing-machine, the combination, with a shaft beneath the work-plate, of a blower-casing surrounding the said shaft, a fan or wing arranged in said casing and attached to said shaft, and ahlast-pipe extending from said'easing to and opening beneath the under side of the throat-plate with its delivery end adjacent to the feed and needle openings to cause currents of air to pass upward through the latter.

In a sewing-machine, the combination, with an oscillating shaft beneath the workplate, of a blower -casing surrounding said shaft, a fan or wing arranged within said casing and attached to said shaft, said fan or wing having a valve or swinging door a, which closes at the forward movements and opens at the return movements and thereby causes an intermittent blast, and a blast-pipe G, extending from said casing to and opening beneath the under side of the throat-plate with its delivery end adjacent to the feed and needle openings, to cause currents of air to pass upward through the latter and thus prevent dirt and lint from falling through the same. p

In testimonywhereof I aifix my signature in presence of two witnesses.

JOHN F. ELLIOTT. Witnesses:

HENRY CALVER, A. V. CUsHMAN. 

